How to get a Layout partially under another

How to get a Layout partially under another - android

<androidx.drawerlayout.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/drawerLayout"
tools:context=".MainActivity">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
android:elevation="0dp">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
app:layout_scrollFlags="scroll|enterAlways"/>
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/toolbar2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
app:layout_scrollFlags="scroll|enterAlways">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="#color/colorAccent"/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<FrameLayout
android:id="#+id/frame"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginTop="-80dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigationView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/drawer_header"
app:menu="#menu/menu_drawer"
/>
The frame layout contains my recycler view..
I've added a collapsing toobar layout for the linear layout
I'm trying to get the frame layout to halfway up the collaping toolbar layout
but This is the result I'm getting
what I want is..
If you have a better method to do this please feel free to help. Im a complete noobie..
I'm sorry for my lack of artistic expertise in the paint image....
Please Check the Answers below For solution If you have the same problem..I've solved mine using the same

Add these attribute inside of your FrameLayout
app:layout_anchor="#id/app_bar"
app:behavior_overlapTop="45dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
app:layout_anchorGravity="bottom"
EDIT:
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="#+id/contentView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorSurface">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="#dimen/placeholder_200_dp"
android:background="#color/red"/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_anchor="#id/app_bar"
app:behavior_overlapTop="45dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rvAttendanceHistory"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_anchorGravity="bottom"
android:layout_marginStart="#dimen/margin_medium"
android:layout_marginEnd="#dimen/margin_medium"
android:background="#drawable/card_white_design"
tools:listitem="#layout/item_student_attendance" />
</FrameLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
The Above layout will make my FrameLayout overlap by 45dp

You should be able to use the elevation attribute on your views to set the Z axis elevation, which will allow those 2 surface to be at different elevations.

It's because of this line:
android:layout_marginTop="-80dp"
You need to remove this first then,
All you need to do is adding this line of code to the FrameLayout:
app:behavior_overlapTop="150dp"

Related

How to hide the searchbar as it starts

I have an topbar for title and icons and a searchbar. When I scroll up both of that hiding and its ok. But I want to hide searchbar when activity start first and show when scroll down first. (Like ios whatsapp application, default is hidden)
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="56dp"
app:layout_scrollFlags="scroll">
//...
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
//...
</RelativeLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Is there any scrollflags for it. Thanks for any help.
Sorry for my terrible english.

add app:expanded="false" to appbarlayout. And use only one bar inside in it.
<RelativeLayout>
<RelativeLayout
android:layout_height="56dp"
android:layout_width="match_parent"
app:layout_scrollFlags="scroll">
//...
</RelativeLayout>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_height="match_parent"
android:layout_width="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
app:expanded="false">
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
//...
</RelativeLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView />
</androidx.coordinatorlayout.widget.CoordinatorLayout>

Use Collapsing ToolBar as shown Code
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Scrollable view here -->
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="#dimen/tall_toolbar_height">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleGravity="top"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

The fragment getting cut by view pagger layout

First, I want to make a tablayout fragment, and in fragment One i want to add recycler view , but the top of recyclerview getting cut by view pagger or tab layout at the top.
getting cut at the top
The top of the recyclerview getting cut by view pagger. The toolbar is separated in other xml
this is fragmentOne.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context="com.example.yehezkiel.eclassapp.OneFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
layout="#layout/navbar_action"
android:layout_width="match_parent"
android:layout_height="wrap_content"></include>
<ProgressBar
android:id="#+id/progressBar2"
style="?android:attr/progressBarStyle"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:visibility="visible"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="304dp" />
<android.support.v7.widget.RecyclerView
android:id="#+id/MainRView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="2dp"
android:layout_marginEnd="6dp"
android:layout_marginStart="6dp"
android:layout_marginTop="2dp"
android:clipToPadding="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="#layout/activity_tablayout"
app:layout_constraintTop_toTopOf="#layout/activity_tablayout">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
</FrameLayout>
and this is the activity_tablayout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.yehezkiel.eclassapp.tablayoutActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar3"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.constraint.ConstraintLayout>
I already tried code below, or change the orientation. But its still going wrong, please someone help me

This is because you are using CoordinatorLayout with ListView. You can change your implementation to RecyclerView to achieve correct scroll.
or If you are tagetting above 5.0, you can use the following piece of code
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
listView.setNestedScrollingEnabled(true);}
I think CoordinatorLayout only works with the children of NestedScrollingChild.

Try replacing the ContraintLayout with the CoordinatorLayout in your activity_tablayout.xml
Check this out for the source code with an example.
Also check out this video
https://www.youtube.com/watch?v=DyyNxJtYTBc
Hope this helps.

You convert your CoordinatorLayout to LinearLayout and set orientation "vertical", like this. I think this will solve your issue.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.yehezkiel.eclassapp.tablayoutActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar3"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>

Nested co-ordinate layout and fitsSystemWindows overlaps status bar

Following is xml for my Main activity
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:orientation="vertical">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#color/bottom_nav_view_color"
app:itemIconTint="#color/bottom_nav_view_icon_tint_selector"
app:itemTextColor="#color/bottom_nav_view_text_color"
app:menu="#menu/navigation" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginBottom="70dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
app:srcCompat="#drawable/ic_assist_icon" />
</android.support.design.widget.CoordinatorLayout>
<include layout="#layout/navi_view_layout" />
Following is xml code for Home fragment
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="245dp"
android:background="#android:color/transparent"
android:fitsSystemWindows="true"
app:layout_behavior="com.gmr.android.FixAppBarLayoutBehavior">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="#color/card_dark_text"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false">
<ImageView
android:id="#+id/imgAirportBg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/screen_bg"
android:tint="#8a000000"
android:visibility="visible"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:elevation="2dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:title="#string/empty"
app:contentInsetStartWithNavigation="0dp"
app:layout_behavior=".view.ToolbarBackgroundAlphaBehavior"
app:layout_collapseMode="pin"
app:logo="#drawable/toolbar_logo"
app:navigationIcon="?attr/homeAsUpIndicator"
app:theme="#style/TransperantToolbar" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/home_recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:descendantFocusability="beforeDescendants"
android:focusable="true"
android:focusableInTouchMode="true"
android:layoutAnimation="#anim/layout_animation_recycler_slide_in"
android:paddingBottom="?attr/actionBarSize"
app:behavior_overlapTop="40dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
Following is xml code for Detail fragment
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="245dp"
android:background="#android:color/transparent"
android:fitsSystemWindows="true"
app:layout_behavior="com.gmr.android.FixAppBarLayoutBehavior">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="#color/card_dark_text"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false">
<ImageView
android:id="#+id/imgStoreBg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/screen_bg"
android:tint="#8a000000"
android:visibility="visible"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:elevation="2dp"
app:layout_behavior=".view.ToolbarBackgroundAlphaBehavior"
app:layout_collapseMode="pin"
app:navigationIcon="?attr/homeAsUpIndicator"
app:theme="#style/TransperantToolbar" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/home_recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:descendantFocusability="beforeDescendants"
android:focusable="true"
android:focusableInTouchMode="true"
android:layoutAnimation="#anim/layout_animation_recycler_slide_in"
android:paddingBottom="?attr/actionBarSize"
app:behavior_overlapTop="30dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
Now when I am calling Detail Fragement from Home Fragment my toolbar overlaps with status bar. If I call Detail fragment from any other fragment it is looking fine. Also toolbar in Home fragment does not overlap with status bar although xml for Home fragment and Detail fragment is nearly the same.
Picture one shows when detail fragment is opened normally
Picture two when detail fragment is opened from home page
Latest update:
This solution is helping me https://medium.com/google-developers/windows-insets-fragment-transitions-9024b239a436 but there are lots of changes involved any other short way to do it?

The symptoms you mention are very similar to the ones, mentioned in this question. To recap from the answer that I have provided there, the issue is, that window insets are being dispatched the first time fragment is being shown, but they are not being next time you are making a fragment transaction.
You have to manually ask for the window insets to be dispatched in order to receive correct system bar paddings:
private void replaceFragment() {
getSupportFragmentManager().beginTransaction()
.replace(R.id.content, new DetailFragment())
// NOTE, we are performing `commitNow()` instead of ordinary `commit()`,
// Because we want this commit to happen sychronously/immediately
.commitNow();
// Ask the framework to dispatch window insets once more to the root of your view hierarchy
ViewCompat.requestApplyInsets(findViewById(R.id.root));
}

Design XML like this,
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/mainLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/home_bg"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:contentScrim="#color/white"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:statusBarScrim="#color/gray">
<ImageView
android:id="#+id/imgStoreBg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/screen_bg"
android:tint="#8a000000"
android:visibility="visible"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:background="#android:color/transparent"
app:layout_collapseMode="pin"
app:theme="#style/AppTheme"
app:title="#string/app_name">
<TextView
android:id="#+id/toolbar_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="#dimen/_45sdp"
android:gravity="center"
android:singleLine="true"
android:textColor="#color/black"
android:textSize="14dp"/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/home_recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:descendantFocusability="beforeDescendants"
android:focusable="true"
android:focusableInTouchMode="true"
android:layoutAnimation="#anim/layout_animation_recycler_slide_in"
android:paddingBottom="?attr/actionBarSize"
app:behavior_overlapTop="40dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
In your JAVA file,
onCreate :
Window window = getWindow();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}

I think you should add this in you detail fragment (just give it a try):
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:title="#string/empty"
app:logo="#drawable/customimage"
and make one image as transparent add it as customimage for detail, this would be probably a trick.
Thank you.

CollapsingToolbarLayout: Fix custom layout on top

here's what I wanna do: I want to display a map in a CollapsingToolbarLayout, below the map should be a custom layout that contains a couple of controls. Below that is a RecyclerView. I want to be able scroll the custom layout as well as the RecyclerView but fix the custom layout at the top while the RecyclerView keeps scrolling.
Here's an image of what I want to achieve (grey = map; red = custom layout; green = RecyclerView):
Here's what I have so far. It works well, except for that the custom layout (red) won't stop scrolling if it reaches the screen's top.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="400dp"
android:orientation="vertical"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<com.mapbox.mapboxsdk.maps.MapView
android:id="#+id/map_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_collapseMode="parallax"
mapbox:zoom="12"
mapbox:style_url="#string/style_light"
mapbox:access_token="#string/access_token">
</com.mapbox.mapboxsdk.maps.MapView>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<include layout="#layout/current_activity"></include>
<android.support.v7.widget.RecyclerView
android:id="#+id/activity_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
What's the easiest way to achieve this behavior?

The answer is actually pretty simple. I just had to move my custom layout into the AppBarLayout.
Here's the layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<com.mapbox.mapboxsdk.maps.MapView
android:id="#+id/map_view"
android:layout_width="match_parent"
android:layout_height="400dp"
app:layout_collapseMode="parallax"
mapbox:zoom="12"
mapbox:style_url="#string/style_light"
mapbox:access_token="#string/access_token">
</com.mapbox.mapboxsdk.maps.MapView>
</android.support.design.widget.CollapsingToolbarLayout>
<include layout="#layout/current_activity"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="?attr/colorAccent"/>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v7.widget.RecyclerView
android:id="#+id/activity_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>

Add app:layout_collapseMode="pin" this attribute in your red view to pin at the top of the screen.
This may fix your issue

CollapsibleToolbarLayout line below header image and back button not showing

I have implemented CollapsibleToolbarLayout as below.
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
app:expandedTitleMarginEnd="40dp"
app:expandedTitleMarginStart="20dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imgPoster"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
android:background="#drawable/place_holder_land" />
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/detailsGradient" />
<ImageView
android:id="#+id/play"
android:layout_width="wrap_content"
android:visibility="invisible"
app:layout_collapseMode="parallax"
android:layout_gravity="center"
android:src="#drawable/ic_play_movie"
android:layout_height="wrap_content" />
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/anim_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="fill_vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
...LinearLayout omitted...
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:clickable="true"
android:src="#drawable/ic_file_download"
app:layout_anchor="#+id/appbar"
app:layout_anchorGravity="bottom|right|end" />
</android.support.design.widget.CoordinatorLayout>
I add the image view in a framelayout in the toolbar so that i can have a overlay on the image and a gradient to make the toolbar text visible on some images
But this color line is coming just below the image (see screenshot) on adding the framelayout. If I remove the line
android:fitsSystemWindows="true"
from appbarlayout then the the color line disapperas but toolbar also scrolls away from the view...
Also to show the back button on the toolbar I have added the below code in OnCreate still it does not show
toolbar = FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.anim_toolbar);
SetSupportActionBar(toolbar);
SupportActionBar.SetDisplayHomeAsUpEnabled(true);
SupportActionBar.SetHomeButtonEnabled(true);
SupportActionBar.Title = content.Title;
toolbar.SetNavigationIcon(Resource.Drawable.ic_action);
collapsingToolbar = FindViewById<CollapsingToolbarLayout>(Resource.Id.collapsing_toolbar);
collapsingToolbar.SetTitle(content.Title);
Thanks...

OK got it now had to remove
android:fitsSystemWindows="true"
from
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
everything good now
Thanks

Consider adding a fixed width to your app bar layout
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="300dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

How to get a Layout partially under another - android

You should be able to use the elevation attribute on your views to set the Z axis elevation, which will allow those 2 surface to be at different elevations.

It's because of this line: android:layout_marginTop="-80dp" You need to remove this first then, All you need to do is adding this line of code to the FrameLayout: app:behavior_overlapTop="150dp"

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CollapsibleToolbarLayout line below header image and back button not showing

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